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<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>width & device-width</title>
	<link rel="stylesheet" type="text/css" href="../css/style.css">
</head>
<body>
	<h1>可视高度与设备高度</h1>
	<h2>width & device-width</h2>
</body>
</html>